In　this　study,　four　parallel　cylindrical　sequencing　batch　reactors,　R1,　R2,　R3　and　R4,　were　operated　by　constant　organic　loading　rate　(OLR)　and　three　alternating　OLR　modes　respectively,　fed　with　synthetic　water.　Their　high　and　low　OLR　were　0.67/0.67,　0.71/0.60,　0.77/0.52　and　0.80/0.40gCOD/(L·d)　respectively.　The　effect　of　high-frequency　alternating　OLR　on　the　performance　of　aerobic　granular　sludge　was　explored　to　provide　feasible　strategies　for　improving　the　stability　of　aerobic　granular　sludge.　The　results　showed,　the　integrity　coefficients　of　R1,　R2,　R3　and　R4　could　reach　87.26%,　94.78%,　96.29%　and　79.63%,　respectively.　The　EPS　content　(VSS)　of　the　four　reactors　were　81.04,　109.46,　115.28　and　139.56mg/g　and　PN/PS　were　4.75,　7.49,　8.28　and　3.26,　respectively,　indicating　that　the　m　value　(high　OLR/low　OLR)　of　1.48　was　beneficial　to　improve　the　structural　stability　of　aerobic　granular　sludge.　In　addition,　the　average　COD　removal　efficiency　of　R1,　R2,　R3　and　R4in　the　stable　period　were　92.58%,　91.52%,　92.45%　and　92.52%,　respectively.　The　average　TP　removal　efficiency　were　92.81%,　93.35%,　95.10%　and　61.01%,　respectively.　The　average　TN　removal　efficiency　were　93.04%,　92.24%,　92.06%　and　85.32%,　respectively,　indicating　that　the　aerobic　granular　sludge　had　the　best　effect　of　removing　pollutants　when　the　m　value　was　1.48.　©　2022　Chinese　Society　for　Environmental　Sciences.　All　rights　reserved.